Pipe-expanding apparatus.



No. 882,305. PATENTPD MAP. 17, 190s.

c. PPLL. PIPA` EXPANDING APPARATUS.

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APPLICATION FILED GOTA, 1907.

WITNESSES Wmv/f No. 882,305. PATBNTBD MAR.`17,1908'.

C. PPLL. Y PIPE BXPANDING APPARATUS.

APPLIGATION FILED OCT-4, 190'1.

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UNTTED sTATEs PATENT oEEioE.

CHARLES FELL, OF LORAIN, OI'IIO, ASSIGNOR TO NATIONAL TUBE COMPANY, OFPITTSBURG, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

PIPE-EXPANDING APPARATUS.

Specification of Letters Patent.

Patented March 17, 1908.

Application filed October 4, 1907. Serial No. 395,914.

T o all whom t may concern:

Be it known that I, CHARLES FELL, of Lorain, Lorain county, Ohio, haveinvented a new and useful Pipe-Expanding Apparatus, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of this specification, inwhich Figure l is a view partly in side elevation and partly in verticalsection of a machine embodying my invention; Fig. 2 isa detail plan viewpartly in section showing the expanding/head Fig. 3 is a verticalsection on the line III-III of Fig. 2, Fig. 4 is an end view of theexpander 5 and Fig. 5 is a detail view of one of the rounding-up blocksor Jaws.

4In the operation of rifling pipes or tubes, the rifling necessarilyextends to the ends of the pipe or tube, and when these ends are to bethreaded to receive a coupling it is necessary to rst expand them forthe purpose of removing this rifling.

The object of my invention is to provide means of simple and ell'icientcharacter by which. the rifling, or any other irregularities in thetube, etc., may be quickly and readily removed and the end portions ofthe pipe or tube expanded to true circular form.

My invention preferably consists of a device of this character in theform of an attachment which can be readily placed upon an ordinarypipe-tl'ircading machine, so that the operations of expanding andthreading can be done by the same machine, the provision of theexpanding attachment in' no way interfering with the operation ofthreading.

The precise nature of my invention will be best understood by referenceto the accompanying drawings, which will now be described, it beingpremised, however, that various changes may be made in the details ofconstruction and arrangement by those skilled in the art withoutdeparting from my invention as defined in the appended claims.

In these drawings, the numeral 2 designates the bed of an ordinarypipe-threading machine. 3 and 41 are the usual holding chucks, which arerotated by the train of gears 5 driven by the motor 6. 7 designates thethreading head, which is mounted on the longitudinally movable carriage8 actuated by the pinion 9, which engages the teeth of the rack l0. llis the usual chuck or head in which the threading tools are carried, andwhich is mounted on the slide l2. These parts are all similar to thoseused on existing pipethreading machines, and need not be described indetail.

The expanding attachment which 'forms the subjectanatter of my inventionconsists of a series (three being shown in the present instance) ofrollers 13. These rollers are of tapered or frusto-conical form, and arejournaled between and upon plates or washers l4, which are arranged toslide in radial guides l5 in the support hereinafter described, aroundthe opening 16 through which the pipes to be expanded pass. The rollersare shown as having openings 17 bored therethrough, into the endportions of which are loosely Vfitted bosses 1S on the plates or washers14. The outer faces of these plates or washers are faced or planed at anangle of ninety degrees to the longitudinal axis of the machine, asshown, while the inner faces of these plates which bear against the endsof the rollers are at an angle to their outer faces whereby the axes ofsuch rollers are brought at an angle to the axis of the pipe to beexpanded, while the tapered surfaces or said rollers at the outer sidesthereof are parallel with such axis.

19 is a truste-conical wedge or expander, which is tapered to the sameangle as the rollers 13, but in the reverse direction, so that as it ismoved forwardly between the rollers, the latter will be moved away .fromthe center. This wedge or expander is counterbored at its large end asshown at 20 to receive the head 2l. of the actuating screw 22, which hasa threaded bearing in a nut 23 seated in the supporting block This screwis actuated by a hand wheel 24. The head of the screw 2l is secured inthe counterbore 20 of the wedge or expander by a retaining plate 25,which is secured to and rotates with the expander. The head 21 has apointed or conical center 26, which has a bearing within the expanderfor the purpose of reducing the friction. The nut 23 is set into acounterbore in the body 23, and is held by the retaining plate 27secured by screws 2S, or other suitable means. When the hand wheel 24 isactuated the screw 22 which is held `from turning by a spline or feather22a, will be moved forward to thereby ywith the entire expanding head,can be force forward the wedge or expander 19, to cause the rollers 13to move out, or away from, the center line of the head.

The pipe or tube A, whose end is to be expanded is secured in the chuck3, or in both the chucks 3 and 4 if it is of sufi'i cient length, withits free end passing through the threading chuck 11 and between therollers 13 and the rounding-up jaws or blocks 29, the latter beingseated in the head 7, and the upper of said blocks having a holding-downscrew 30. As the pipe or tube is rotated while the tapered rollers 13are being moved forward by the action of the screw 22, the outer facesof said rollers will expand the said pipe or tube in a directionparallel with its axis. The contact between these rollers and the innersurface of the pipe or tube will cause the rollers to rotate, and thesein turn rotate the wedge or expander 19. A roller be-aring effect isthus produced which extends very greatly the life of the tool.

23b is a cap which is fastened to the body 237 and which forms the endbearing or slide for the rear plates or washers 14. 31 designates a capwhich is rotatably secured to the body 23a by a stud or screw 33, whoseend runs in a circular groove in said body. This collar acts as a gagefor the expanding head as the latter enters the pipe or tubes, and as itextends beyond the face of the slots in said body in which the frontwashers 14 are seated, it also acts as a guard to prevent said washersand the rollers from falling out of place. The body 23?L is held in theframe 34 by the pivoting screws 35. T hese screws permit the entireexpanding head to swing in a horizontal plane so that it can adjustitself when being put in or taken out of a pipe or tube. The frame 34 ishinged at 34a to a bracket 36, which is fastened to the carriage 8. Thefree end of the carriage is normally secured in the operative positionshown in Fig. 2 by a removable coupling pin 37. By removing this pin,the frame 34, together swung backwardly out of the way, the movement ofthe head on the pivoting screws 35 permitting the head to be moved so asto pass out of the opening 16. the expanding attachment-may be movedentirely out of the operators way during the other necessary operationson the end of the p lfllhe expanding head can be adjusted back and forthby means of the screws 33, which bite against the nuts 39 of thepivoting screws 35.

The rounding-up blocks or dies 29 are shaped so as to fit closely to theoutside diameter of the pipe, so that the rollers 13 cannot expand thepipe beyond its proper size.

In this manner The advantages of my invention result from the provisionof the means described l whereby rifling or other irregularities may beeectually removed from the ends of pipes or tubes, and a true diametergiven thereto for a length necessary for the cutting of threads thereon.Also from the provision of means of Athis character which can be used inthe form of an attachment to a pipe-threading machine in such a mannerthat the pi e may be expanded and the thread cut t ereon withoutremoving the pipe from the machine, the expanding attachment beingcapable of being moved out of the way of the threading tools in themanner described.

1 claim 1. The combination with a pipe-threading machine, having athreading carriage and head, of an expanding tool pivotally attached tothe carriage and arranged to be swung out of the way of the threadingoperations, said head having a series of radially movable expandingrollers 5 substantially as described.

rlhe combination with a pipe-threading machine having a threadingcarriage and head, of an expanding tool pivotally attached to saidcarriage and arranged to be swung out of the way of the threadingoperations; substantially as described.

3. The combination with a pipe-threading machine having a threadingcarriage and chuck, the said carriage having an opening therein throughwhich the pipes are passed, a head adapted to enter the said opening andwithin the end portion of a pipe, a series of tapered radially movableexpanding rollers seated in said head, an expanding member for forcingthe series of rollers simultaneously outward, and a gage collar carriedby said head, said collar also acting as a guard for the said rollers,substantially as described.

4. 1n a pipe-threading and expanding machine, a threading carriage, aframe hinged thereto, and an expanding tool pivoted in said frame;substantially as described.

5, 1n a pipe-threading and expanding machine, a threading carriage, aframe hinged thereto,I an expanding tool pivoted in said frame, andmeans for adjusting the tool longitudinally in the frame; substantiallyas described.

6. In a pipe-expanding and threading machine, a threading carriage, aframe hinged thereto, and an expanding tool pivoted in said frame, saidtool consisting of a head having a plurality of radially movableexpanding rollers seated therein, and means for forcing said rollerssimultaneously outward, substantially as described.

1n testimony whereof, 1 have hereunto set my hand.

CHRLES FELL.

Witnesses D. L. JENKINS, J. S. CRAIG.

